door INFINITI QX56 2011 Factory Service Manual

DLK-82
< DTC/CIRCUIT DIAGNOSIS >
U1000 CAN COMM CIRCUIT
DTC/CIRCUIT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000006225873
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN H-line, CAN L-line) al lowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to LAN-28, "
CAN COMMUNICATION SYSTEM : CAN Communica-
tion Signal Chart".
DTC LogicINFOID:0000000006225874
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000006225875
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result”.
Is
“CAN COMM CIRCUIT” displayed?
YES >> Refer to LAN-18, "Trouble Diagnosis Flow Chart".
NO >> Refer to GI-40, "
Intermittent Incident".
DTCCONSULT-III display
description DTC detecting condition Possible cause
U1000 CAN COMM When automatic back door control unit cannot
communicate CAN communication signal con-
tinuously for 2 seconds or more.
CAN communication system
Revision: 2010 May2011 QX56

U1010 CONTROL UNIT (CAN)DLK-83
< DTC/CIRCUIT DIAGNOSIS >
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U1010 CONTROL UNIT (CAN)
DTC LogicINFOID:0000000006225876
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000006225877
1.REPLACE AUTOMATIC BACK DOOR CONTROL MODULE
When DTC [U1010] is detected, replac e automatic back door control module.
>> Replace automatic back door control module. Refer to DLK-262, "
Removal and Installation".
DTCCONSULT-III dis-
play description DTC detecting condition Possible cause
U1010 CONTROL UNIT
(CAN) Automatic back door control unit detected inter-
nal CAN communication circuit malfunction Automatic back door control mod-
ule
Revision: 2010 May2011 QX56

DLK-84
< DTC/CIRCUIT DIAGNOSIS >
B2401 IGNITION POWER SUPPLY CIRCUIT
B2401 IGNITION POWER SUPPLY CIRCUIT
DTC LogicINFOID:0000000006225878
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait for at least 1 second.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-84, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225879
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10A fuse, [No. 4, located in fuse block (J/B)].
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect automatic back door control unit connector.
3. Check voltage between automatic back door control unit harness connector and ground.
Is the measurement value normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
NO >> Repair or replace harness.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2401 IGN OPEN When the automatic back door control unit detects
the following condition for 0.3 second or more
 Power supply condition (OFF) of automatic back
door control unit and Ignition position signal (ON)
from BCM via CAN Fuse
 Harness or connectors
(Ignition power supply condition
circuit is open or shorted)
(+)
(− ) Condition Vo l ta g e
(Approx.)
Automatic back door control unit
Connector Terminal
B26 9 Ground Ignition switch ON Battery voltage
OFF 0 V
Revision: 2010 May2011 QX56

B2403 ENCODERDLK-85
< DTC/CIRCUIT DIAGNOSIS >
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B2403 ENCODER
DTC LogicINFOID:0000000006225880
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-85, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225881
1.CHECK AUTOMATIC BACK DOOR CONTROL MODULE POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check automatic back door control module power supply and ground circuit. Refer to DLK-116, "
AUTOMATIC BACK DOOR CONTROL UNIT : Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace automatic back door control module. Refer to DLK-262, "Removal and Installation".
NO >> Repair or replace the malfunctioning parts.
DTC CONSULT-III dis-
play description DTC detecting condition Possible cause
B2403 PULSE ENCODER When the automatic back door control unit can not re-
ceive the signal from the encoder just after starting the
open/close operation  Battery voltage (low battery)
 Automatic back door control mod-
ule
Revision: 2010 May2011 QX56

DLK-86
< DTC/CIRCUIT DIAGNOSIS >
B2409 HALF LATCH SWITCH
B2409 HALF LATCH SWITCH
DTC LogicINFOID:0000000006225882
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-86, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225883
1.CHECK HALF LATCH SWITCH SIGNAL
1. Select “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-III.
2. Select “HALF LATCH SW” in “DATA MONITOR” mode.
3. Check that the function operates normall y according to the following conditions.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK HALF LATCH INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect back door lock assembly connector.
3. Check voltage between back door lock assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK HALF LATCH SWITCH CIRCUIT
1. Disconnect automatic back door control module connector.
2. Check continuity between automatic back door control module harness connector and back door lock
assembly harness connector.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2409 HALF LATCH SW When the automatic back door control unit can not
detects the half latch switch ON condition even
when the back door is in the open position  Half latch switch
 Harness or connectors
(Half latch switch circuit is open)
 Automatic back door control mod-
ule
Monitor item Condition Status
HALF LATCH SW Back door Fully closed/Half latch OFF
Open ON
(+)
(–)Voltag e
(Approx.)
Back door lock assembly
Connector Terminal D157 6 Ground Battery voltage
Revision: 2010 May2011 QX56

B2409 HALF LATCH SWITCHDLK-87
< DTC/CIRCUIT DIAGNOSIS >
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Is the inspection result normal?
YES >> Replace automatic back door control module. Refer to DLK-262, "Removal and Installation".
NO >> Repair or replace harness.
4.CHECK HALF LATCH SWITCH GROUND CIRCUIT
Check continuity between back door lo ck assembly harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace back door lock assembly ground circuit.
5.CHECK HALF LATCH SWITCH
Refer to DLK-87, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace back door lock assembly.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006225884
COMPONENT INSPECTION
1.CHECK HALF LATCH SWITCH
1. Turn ignition switch OFF.
2. Disconnect back door lock assembly.
3. Check continuity between back door lock assembly terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace back door lock assembly.
Automatic back door control module Back door lock assembly Continuity
Connector Terminal Connector Terminal
B26 8 D157 6 Existed
Back door lock assembly GroundContinuity
Connector Terminal
D157 8 Existed
Back door lock assembly Condition Continuity
Te r m i n a l
6 8 Back door lock Open Existed
Fully closed/Half latch Not existed
Revision: 2010 May2011 QX56

DLK-88
< DTC/CIRCUIT DIAGNOSIS >
B2416 TOUCH SENSOR RH
B2416 TOUCH SENSOR RH
DTC LogicINFOID:0000000006225885
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-88, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225886
1.CHECK HALF LATCH SWITCH SIGNAL
1. Select “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-III.
2. Select “TOUCH SEN RH” in “DATA MONITOR” mode.
3. Check that the function operates normall y according to the following conditions.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK TOUCH SENSOR INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect touch sensor RH connector.
3. Check voltage between touch sensor RH harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK TOUCH SENSOR RH CIRCUIT
1. Disconnect automatic back door control module connector.
2. Check continuity between automatic back door c ontrol module harness connector and touch sensor RH
harness connector.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2416 TOUCH SEN R
OPEN When the automatic back door control unit detects
the open circuit of the touch sensor RH  Touch sensor RH
 Harness or connectors
(Touch sensor RH circuit is open)
 Automatic back door control mod-
ule
Monitor item Condition Status
TOUCH SEN RH Touch sensor RH Other than below OFF
Detect obstruction ON
(+)
(–)Vol tag e
(Approx.)
Touch sensor RH
Connector Terminal D108 1 Ground 6 V
Revision: 2010 May2011 QX56

B2416 TOUCH SENSOR RHDLK-89
< DTC/CIRCUIT DIAGNOSIS >
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Is the inspection result normal?
YES >> Replace automatic back door control module. Refer to DLK-262, "Removal and Installation".
NO >> Repair or replace harness.
4.CHECK TOUCH SENSOR RH GROUND CIRCUIT
1. Disconnect automatic back door control module and touch sensor LH connectors.
2. Check continuity between automatic back door c ontrol module harness connector and touch sensor RH
harness connector.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace harness.
5.CHECK TOUCH SENSOR RH
Refer to DLK-89, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace touch sensor RH.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006225887
1.CHECK TOUCH SENSOR RH
1. Turn ignition switch OFF.
2. Disconnect touch sensor RH connector.
3. Check resistance between touch sensor RH terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace touch sensor RH.
Automatic back door control module Touch sensor RH Continuity
Connector Terminal Connector Terminal
B26 16 D108 1 Existed
Automatic back door control module Touch sensor RH Continuity
Connector Terminal Connector Terminal
B26 15 D108 2 Existed
Touch sensor RH ConditionResistance
(Approx.)
Te r m i n a l
1 2 Touch sensor RH Detect obstruction 120
Ω or less
Other than above 1 k Ω ± 10%
Revision: 2010 May2011 QX56

DLK-90
< DTC/CIRCUIT DIAGNOSIS >
B2417 TOUCH SENSOR LH
B2417 TOUCH SENSOR LH
DTC LogicINFOID:0000000006225888
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “AUTOMAT IC BACK DOOR CONTROL UNIT” using CONSULT-
III.
Is DTC detected?
YES >> Refer to DLK-90, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006225889
1.CHECK HALF LATCH SWITCH SIGNAL
1. Select “AUTOMATIC BACK DOOR CONTROL UNIT” using CONSULT-III.
2. Select “TOUCH SEN LH” in “DATA MONITOR” mode.
3. Check that the function operates normall y according to the following conditions.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK TOUCH SENSOR INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect touch sensor LH connector.
3. Check voltage between touch sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK TOUCH SENSOR LH CIRCUIT
1. Disconnect automatic back door control module.
2. Check continuity between automatic back door c ontrol module harness connector and touch sensor LH
harness connector.
DTC CONSULT-III display
description DTC detecting condition Possible cause
B2417 TOUCH SEN L
OPEN When the automatic back door control unit detects
the open circuit of the touch sensor LH.  Touch sensor LH
 Harness or connectors
(Touch sensor LH circuit is open)
 Automatic back door control mod-
ule
Monitor item Condition Status
TOUCH SEN LH Touch sensor LH Other than below OFF
Detect obstruction ON
(+)
(–)Voltag e
(Approx.)
Touch sensor LH
Connector Terminal D107 1 Ground 6 V
Revision: 2010 May2011 QX56

B2417 TOUCH SENSOR LHDLK-91
< DTC/CIRCUIT DIAGNOSIS >
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Is the inspection result normal?
YES >> Replace automatic back door control module. Refer to DLK-262, "Removal and Installation".
NO >> Repair or replace harness.
4.CHECK TOUCH SENSOR LH GROUND CIRCUIT
1. Disconnect automatic back door control module and touch sensor RH connectors.
2. Check continuity between automatic back door c ontrol module harness connector and touch sensor LH
harness connector.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace harness.
5.CHECK TOUCH SENSOR LH
Refer to DLK-91, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace touch sensor LH.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006225890
1.CHECK TOUCH SENSOR LH
1. Turn ignition switch OFF.
2. Disconnect touch sensor LH connector.
3. Check resistance between touch sensor LH terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace touch sensor LH.
Automatic back door control module Touch sensor LH Continuity
Connector Terminal Connector Terminal
B26 14 D107 1 Existed
Automatic back door control module Touch sensor LH Continuity
Connector Terminal Connector Terminal
B26 15 D107 2 Existed
Touch sensor LH ConditionResistance
(Approx.)
Te r m i n a l
1 2 Touch sensor LH Detect obstruction 120
Ω or less
Other than above 1 k Ω ± 10%
Revision: 2010 May2011 QX56